[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'CalcForm' (#lcl)

TCalculatorPanel

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

Implements a panel used for buttons and the value display in a calculator form.

Declaration

Source position: calcform.pas line 45

type TCalculatorPanel = class(TPanel)

protected

  procedure ErrorBeep;

  

  procedure TextChange; virtual;

  

Sets the display text for the associated control and signals OnTextChange.

  class procedure WSRegisterClass; override;

public

  constructor CreateLayout();

  

Initializes and configures the calculator panel using the specified layout.

  procedure CalcKeyPress();

  

Locates the button using the specified Key and perform its Click method.

  procedure Copy;

  

Loads the value in Text into the Clipboard as a text value.

  procedure Paste;

  

Pastes text from the Clipboard into the text display for the calculator panel.

  function WorkingPrecision;

  

Gets the minimum number of precision digits allowable for the panel.

  procedure UpdateMemoryLabel;

  

Updates the Memory indicator to reflect a non-zero value in the Memory property.

  property DisplayValue: Double; [rw]

  

Contains the Double value representing the Text in the panel.

  property Memory: Double; [rw]

  

Contains the Double value stored in the memory for the calculator.

  property Precision: Byte; [rw]

  

Maximum number of digits of precision allowed for the Double value in the calculator.

  property BeepOnError: Boolean; [rw]

  

Indicates if a beep occurs when an error condition is detected in the calculator panel.

  property Status: TCalculatorState; [rw]

  

Contains the status or state for the calculator panel.

  property OperatorChar: Char; [rw]

  

Character representing the last operator entered in the calculator panel.

  property Text: string; [r]

  

Text representation for the Double value in the calculator.

  property OnOkClick: TNotifyEvent; [rw]

  

  property OnCancelClick: TNotifyEvent; [rw]

  

  property OnResultClick: TNotifyEvent; [rw]

  

  property OnError: TNotifyEvent; [rw]

  

  property OnTextChange: TNotifyEvent; [rw]

  

  property OnCalcKey: TKeyPressEvent; [rw]

  

  property OnDisplayChange: TNotifyEvent; [rw]

  

  property Color: TColor;

  

Color for the calculator panel.

end;

Inheritance

TCalculatorPanel

  

Implements a panel used for buttons and the value display in a calculator form.

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TPanel

  

Implements a general purpose container which can hold other components.

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TCustomPanel

  

The base class for a general container which can hold other objects. It has a customizable border and a central text.

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TCustomControl

  

The base class for windowed controls which paint themselves.

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TWinControl

  

Implements a windowed control which can contain other child controls.

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TControl

  

The base class for visible controls.

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TLCLComponent

  

The base class for LCL components which have an associated widget.

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TComponent

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TObject